Re: Memory leak in for loops
Sandino Araico Sánchez wrote:
>1.
> #!/bin/bash
>2.
>
>3.
> for i in {0..15000} ; do
>4.
> echo $i > /dev/null
>5.
> done
>
>
>
> Repeat-By:
> Run the script above and the process starts leaking memory very
> fast.
>
>
You know what a memory *leak* is, yes? mallocs() without proper free()s.
What you mean is that your memory is used. Feel free to calculate the
memory that is needed to store the string representation of
{0..15000}, I think you will get a number near your RAM size.
J.
Re: Memory leak in for loops
Jan Schampera schrieb:
Sandino Araico Sánchez wrote:
1.
#!/bin/bash
2.
3.
for i in {0..c} ; do
4.
echo $i > /dev/null
5.
done
Repeat-By:
Run the script above and the process starts leaking memory very
fast.
You know what a memory *leak* is, yes? mallocs() without proper free()s.
What you mean is that your memory is used. Feel free to calculate the
memory that is needed to store the string representation of
{0..15000}, I think you will get a number near your RAM size.
J.
... and try
for (( i = 0; i < 15000; ++i ))
do
echo $i > /dev/null
done
instead. Consumes nearly no memory at all.
Cheers,
Bernd
--
Bernd Eggink
http://sudrala.de
Re: Memory leak in for loops
OK. Thanks. I have understood the difference.
Bernd Eggink wrote:
> Jan Schampera schrieb:
>> Sandino Araico Sánchez wrote:
>>
>>>1.
>>> #!/bin/bash
>>>2.
>>> 3.
>>> for i in {0..c} ; do
>>>4.
>>> echo $i > /dev/null
>>>5.
>>> done
>>>
>>>
>>>
>>> Repeat-By:
>>> Run the script above and the process starts leaking memory very
>>> fast.
>>>
>>>
>>
>> You know what a memory *leak* is, yes? mallocs() without proper free()s.
>>
>> What you mean is that your memory is used. Feel free to calculate the
>> memory that is needed to store the string representation of
>> {0..15000}, I think you will get a number near your RAM size.
>>
>> J.
>>
>>
>
> ... and try
>
> for (( i = 0; i < 15000; ++i ))
> do
> echo $i > /dev/null
> done
>
> instead. Consumes nearly no memory at all.
>
> Cheers,
> Bernd
>
>
--
Sandino Araico Sánchez
http://sandino.net
